Getting Into the Zero Downtime Deployment World

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Getting Into the Zero Downtime Deployment World Tugberk Ugurlu Redgate Software @tourismgeek tugberkugurlu.com #ndcoslo https://flic.kr/p/fNTDM1

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What is This? #ndcoslo https://flic.kr/p/cdvAaj

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#ndcoslo Example HTTP APIs v1 Example Android iPhone Example Android Client Example Web Client Example HTTP APIs v1.1

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Should I Care? #ndcoslo https://flic.kr/p/e7oMGm

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#ndcoslo https://flic.kr/p/49FHd3

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https://twitter.com/tourismgeek/status/580270772402393088 #ndcoslo

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A Sample Case #ndcoslo

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LB zleek-0 zleek-1 zleek-n mongodb neo4j elasticsearch rabbitmq recipe-generation-worker-0 recipe-sync-worker-0 food-sync-worker-0 store-sync-worker-0 recipe-generation-worker-1 recipe-generation-worker-n recipe-sync-worker-n recipe-sync-worker-0

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Continuous Delivery #ndcoslo https://flic.kr/p/bzG7ds

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#ndcoslo https://gist.github.com/revett/99d8a5143c0bfeddfc92 Our Target

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Our Scope #ndcoslo

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Type of Applications • HTTP Services • Web Sites #ndcoslo

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#ndcoslo https://flic.kr/p/mRRFdH The Path and Guidance

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Write Down the Deployment Strategy #ndcoslo https://flic.kr/p/pd4X4A

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#ndcoslo

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Script out the Deployment Strategy https://flic.kr/p/79EVn6

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#ndcoslo

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Release Management Software https://octopus.com/ #ndcoslo

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#ndcoslo

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True Staging Environment #ndcoslo

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example-api-v0-6786234 example-api- process example-api-v0-6327638 example-api- process Router v0.example.com

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Blue-green Deployment http://martinfowler.com/bliki/BlueGreenDeployment.html #ndcoslo

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Router v0.example.com #ndcoslo example-api-v0-6327638 example-api- process example-api-v0-6786234 example-api- process

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Drain Requests #ndcoslo https://flic.kr/p/79A7Db

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Router v0.example.com #ndcoslo example-api-v0-6327638 example-api- process example-api-v0-6786234 example-api- process

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Router v0.example.com #ndcoslo example-api-v0-6327638 example-api- process example-api-v0-6786234 example-api- process

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SemVer Your Software http://www.tugberkugurlu.com/archive/versioning-software-builds-based-on-git-tags-and-semantic-versioning-semver #ndcoslo

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SemVer Your Software • See semver.org • Support 2 Major versions of the HTTP Service, not 1, not 3. • Define a support policy for support lifetime for versions #ndcoslo

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Type of Changes • Patch: No user facing changes, all internal. • Minor: Add functionality in a backwards-compatible manner • Major: Introducing incompatible changes • See semver.org for more information #ndcoslo

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Minor-Patch Releases • No breaking changes #ndcoslo

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example-api-v0-6327638 example-api-v0-7814219 example-api-v0-9528392 LB v0.example.com example-api- process example-api- process example-api- process example-api-v0-6786234 example-api-v0-3266280 example-api-v0-8429842 example-api- process example-api- process example-api- process

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DEMO https://github.com/tugberkugurlu/AspNetCoreSamples/tree/ndcoslo2016/haproxy-zero-downtime-sample #ndcoslo

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HAProxy Config Reload http://engineeringblog.yelp.com/2015/04/true-zero-downtime-haproxy-reloads.html #ndcoslo

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Internal LB-1 LB-1 Internal LB-2 server1 server2 server3 server4 server5 server6 server7 server8 server9 server10 client client client client client client #ndcoslo

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Multiple Load Balancer Nodes http://robert.penz.name/386/howto-setup-a-haproxy-as-fault-tolerant-high-available-load-balancer-for-multiple-caching-web-proxies-on-rhelcentossl/ #ndcoslo

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#ndcoslo http://robert.penz.name/386/howto-setup-a-haproxy-as-fault-tolerant-high-available-load-balancer-for-multiple-caching-web-proxies-on-rhelcentossl/

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Major Releases • Breaking Changes • First Major Release • Non-first Major Releases #ndcoslo

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example-api-v0-6327638 example-api-v0-7814219 example-api-v0-9528392 LB v0.example.com example Products example Products example Products example-api-v1-2276168 example-api-v1-5677802 example Products example Products LB v1.example.com example-api-v1-7182721 example Products

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Prefer Fast-forward Database Changes #ndcoslo

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#ndcoslo Id Make M 1 Renault Cl 2 Mercedes GL 3 Volkswagen Po 4 Toyota Ya v1 v2 Id Make Model Colour 1 Renault Clio Red 2 Mercedes GLA Black 3 Volkswagen Polo White 4 Toyota Yaris Yellow Id Make Model Colour 1 Renault Clio Red 2 Mercedes GLA Black 3 Volkswagen Polo White 4 Toyota Yaris Yellow

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Do Not Override Client Side Assets #ndcoslo

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#ndcoslo v1 v1.1

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#ndcoslo v1 v1.1

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Be Aware of the Context #ndcoslo

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Be Aware of the Context • Cookies • Sessions • Authentication Tokens #ndcoslo

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Sticky Sessions http://blog.haproxy.com/2012/03/29/load-balancing-affinity-persistence-sticky-sessions-what-you-need-to-know/ #ndcoslo

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Helpful Tools • Git (https://git-scm.com) • Travis CI (https://travis-ci.org) • Octopus Deploy (https://octopus.com) • HAProxy (http://haproxy.org) • node-semver CLI (http://bit.ly/1PO6hvR) • Docker (https://docker.com) • Docker Cloud (a.k.a. Tutum, http://bit.ly/1RYYtl2) • SQL Server Data Tools (SSDT, http://bit.ly/1P7qETh) • DLM Automation Tools from Redgate (http://bit.ly/1VQ2rDm) #ndcoslo

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@tourismgeek github.com/tugberkugurlu linkedin.com/in/tugberk https://flic.kr/p/edfM1R